Since 1999, Great Lakes Minerals, LLC (GLM) has been providing refractory and abrasive customers with the highest quality processed industrial minerals available. We offer the following materials which are used in a wide range of applications across the refractory and abrasive markets: • Chinese Bauxite (RD-88): high density, high alumina uniform fired Chinese bauxite • Chinese Bauxite (RT-90): high density, high alumina, rotary kiln-fired Chinese bauxite • Guyanese Bauxite (RASC – Refractory "A" Grade Super • Calcined Bauxite): high alumina, low impurities Guyane